System Check Chart D-2: Data Circuit Problem
NOTE:
The following step numbers refer to circled numbers on diagnostic chart. See Fig 1
. For circuit identification, see Figure
.
- The fault has been isolated to between the ALDL and the programmer. This step checks circuit 8OOF.
- This will determine if the hardware (ECM or Programmer) are suspect, or if the condition is in circuit 800E.
- The problem is within the ECM, Programmer ground, or Programmer, reconnecting the programmer will isolate the ECM.